Slow and hangs all the time.

I have Lenovo Ideapad 7VIN.
It’s been less than a week that I bought it and it is the worst laptop I have ever used. It hangs if you open more than 1 application at the same time. Also during video calls if you keep your mobile nearby then it makes screeching sounds which is very unpleasant to hear. While using the internet,whenever one opens a new tab in Google Chrome, it takes forever for it to respond. I know for sure that it is not a network issue! My other laptop (Dell Inspiron N4010) which is 10 years old works much better. I wasted 40k on this piece of shit and I can not even return the product.